To keep planes clean and smooth in appearance the grain must be filled. Clean off the surface with a joiner's scraper and fine glasspaper, rubbing along rather than across the grain. Rub with linseed oil sparingly on a clean rag. With a wadding or flannel rub with French polish, the rubber being freely wetted at first, but moist only afterwards. The porous surface of the wood will soon become smooth, and moisture and dirt will be less likely to stick. Work until all the oil has been absorbed and a slight polish appears.